News

Aluminum extrusions are hard to coat evenly. Deep channels, hollow chambers, and sharp grooves trap the Faraday cage effect, leaving thin film build and bare spots that drive up rework. This guide explains why traditional corona and tribo guns struggle inside recessed profiles, and how the QXD-Q7 rotary cup gun uses centrifugal atomization to push powder into the areas that matter — with less waste and higher first-pass yield.

Powder coating welded tubes, square profiles, and complex frames? Bare spots at T-joints, thin coverage on weld seams, and high rework rates are the top complaints from metal fabricators. This guide explains why traditional handheld powder guns fail on tube and frame geometries — and how the Q7 rotary atomization gun solves the Faraday cage effect on internal corners, joints, and hidden cavities.

Wire mesh, grating, and chain-link fence are among the hardest surfaces to powder coat evenly. Unlike solid metal parts, open mesh geometry causes powder to pass straight through the gaps — a problem known as blowback — while the Faraday cage effect leaves rear wire surfaces thin or uncoated. This guide covers why standard corona guns struggle on wire products, which technique adjustments actually help, and how rotary centrifugal atomization delivers measurably better coverage on mesh, grating, and fence without the powder waste.

Corona and tribo are the two dominant electrostatic powder coating technologies — and they perform very differently on complex geometry. Corona guns struggle with the Faraday cage effect on internal recesses, while tribo guns require special powder formulations. This guide breaks down exactly how each works, where each excels, and introduces a third technology that solves the limitations of both.

Choosing the right electrostatic powder coating gun makes the difference between clean coverage and costly rework. This guide covers atomization technology, handheld vs. fixed systems, and the key specs metal fabricators need to evaluate before buying.

Struggling with the Faraday cage effect in powder coating? Discover 3 proven strategies — voltage control, airflow management, and rotary atomization — to coat complex parts evenly.

Internal corners and recessed areas are the hardest spots to powder coat — caused by the Faraday cage effect. Learn why traditional spray guns fail and how the Q7 handheld electrostatic powder gun, powered by Air-Free Centrifugal Atomization, delivers complete coverage

The Faraday cage effect is the biggest unsolved problem in powder coating—leaving inside corners, recessed areas, and complex geometries with poor coverage. Learn what causes it, why traditional handheld guns can't solve it, and how the Paint Brothers Q7 is the world's first portable solution engineered to break through it.

QXD Coating attended the 2025 Shanghai International Surface Treatment Exhibition (CISTEC 2024), showcasing our latest powder coating solutions and connecting with industry partners from around the world.